Stock-Based Compensation - Schedule of Stock Option Activity (Details) - $ / shares	6 Months Ended	12 Months Ended
Jun. 30, 2020	Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Shares, Outstanding	25,617,338
Number of Shares, Granted	4,235,000
Number of Shares, Canceled/Forfeited	(15,947,902)
Number of Shares, Outstanding	13,904,436	25,617,338
Number of Shares, Exercisable	10,935,545
Weighted Average Exercise Price, Outstanding	$ 0.16
Stock options, exercise price	0.42
Weighted Average Exercise Price, Canceled/Forfeited	0.14
Weighted Average Exercise Price, Outstanding	0.26	$ 0.16
Weighted Average Exercise Price, Exercisable	$ 0.27
Weighted Average Remaining Contractual Life, Outstanding	3 years 7 months 6 days	1 year 10 months 24 days
Weighted Average Remaining Contractual Life, Exercisable	2 years

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average price of options that were either forfeited or expired.

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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